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GW191204_110529 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW191204_110529

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW191204_110529

Both component-mass lower bounds exceed 3 solar masses

Primary mass27.3 M☉

Secondary mass19.2 M☉

ObservedDec 4, 2019

Event identity

Classification and release

ID: gwtc:GW191204_110529
Event name: GW191204_110529
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-3-confident
Preferred event version: v1
Observed at: Wednesday, December 4, 2019 at 11:05:29 AM UTC UTC
GPS time: 1,259,492,747.5

Source-frame posterior

Component and remnant masses

Primary mass: 27.3 (-5.9, +10.8) M☉
Secondary mass: 19.2 (-6, +5.5) M☉
Remnant mass: 45 (-7.5, +8.7) M☉
Effective spin: 0.05
Network SNR: 8.9

Propagation

Distance and statistical context

Luminosity distance: 1,900 (-1,100, +1,700) Mpc
Redshift: 0.34
Astrophysical probability: 0.7424
False-alarm rate: 3.3

Provenance

Official source record

GWOSC · GWTC-3-confident

GW191204_110529

Last synchronized 9/12/2026, 1:40:20 AM UTC.

JSON record GWOSC event page